Piston.



No. 685,0l5. Patented Oct. 22, I90I.

S. K. TODD.

PISTON.

{Application filed. Jan. 29, 1901.)

(No Model.)

IV/ yw'lisslas" INVENTOR WWW UNITED STATES.

PATENT 'FFICE.

SAMUEL K. TODD, OF CAYUGA, INDIANA.

PISTON.

srncrrxca'rron forming part of Letters Patent No. 685,015, dated October 22, 1901.

Application filed January 29, 1901. flerlal No. 46,243. (No model.)

To all whom it may concern.-

Be it known that L'SAMUEL K. TODD, a citizen of the United States, residing at Cayuga,

in the county of Vermilion and State of In- This inventionrelates to pistons; and it consists in the novel construction and combination of the parts hereinafter fully described and claimed.

In the drawing the figure is a longitudinal section through the piston.

A is the body portion of the piston, which is secured to a piston-rod a in any approved manner.

B is the piston-follower, which is adjustable with respect to the body portion of the piston. The follower B is preferably slidable on the hub b of the body portion A.

0 represents bolts or screws which couple together the follower and the body portion and which draw them together when tightened up.

flanged, which projects from the smaller end The folof the cone D toward the follower. lower B has a cone D similar to the cone D but facing in the opposite direction, and the cone D is slidable over theflange d. The two cones D and D together form a groove E in the periphery of the piston.

or extended.

F is a packing-ring of antifriction metal, such as Babbitt metal,which may be stretched The ring 'F is made to fit the cylinder in which the piston works, and it has double conical surfaces'ff on its under side, corresponding in inclination with the conesD and D. The packing-ring F is arranged in the groove E and is forced into contact with the cylinder by moving the follower toward the body portion of the cylinder. The packing-ring is stretched or expanded to fit the cylinder from time to time as it becomes worn.

\Vhat I claim is-- g 1. Ina piston, the combination, with a body portion provided with a cone nearits periphery and a central hub, of a follower portion also provided with a cone near its periphery and slidable on the said hub leaving the'end thereof uncovered, a packing-ring seated on the said cones, and means for adjusting and locking the said follower portion independent of the piston-rod, substantially as set forth.

2. In a piston, the combination, with a body portion provided with a cone near its periphery, a flange projecting from the smaller end of the cone, and a central hub; of a follower portion also provided with a cone near its periphery which slides upon the said flange, said follower being slidable on the said hub, a packing-ring seated on the said cones, a piston-rod secured to the said hub independent of the follower portion, and means for adj usting and locking the said follower portion independent of the piston-rod, substantially as set forth.

In testimony whereof I affix my sig in presence of two witnesses.

SAMUEL K. TODD.

Witnesses:

WM. DUNKERLY, JOHN D. TODD.

ature. 

